Structural and spectroscopic investigations of neodymium‐doped strontium borophosphate glass

Abstract

Neodymium-doped glass finds application in lasers with high energy and low pulse width. In the present study, a series of Nd 3+ ions (0-2 mol%)-doped strontium borophosphate (SBP) glass samples was prepared through the conventional melt quench method. A broad peak in the X-ray diffraction spectrum confirmed the formation of a single-phase amorphous borophosphate glass. Fourier transform infrared spectra of the doped and undoped glass samples indicated the presence of borate and phosphate groups that form the anionic network. The thermal properties of the glass samples were determined from thermogravimetry/differential thermal analysis.Photoluminescence and ultraviolet-visible light techniques were used to investigate the optical properties of the as-prepared SBP:Nd glass. The Judd-Ofelt (JO) intensity parameters Ω λ (2, 4, 6), stimulated emission cross-section, branching ratios, and transition probabilities of the Nd 3+ -doped glass were obtained through the JO analysis.Characteristic Nd 3+ emission peaks were observed at 1330, 1060, and 876 nm, corresponding to the 4 F 3/2 ! 4 I S/2 (S = 13, 11, and 9) transitions, respectively. The suitability of SBP:Nd (0.5 mol%) glass for use in solid-state lasers was demonstrated by its intense luminescence, high transition probability, high emission cross-section, optical gain, and luminescence branching ratio.

DC Conductivity of Lithium-Zinc-Boro- Phosphate Glasses

“…Pagoti et al ( 2021) investigated (100-x), 35B 2 O 3 + 10P 2 O 5 + 30Li 2 O+15ZnO+10SrO+ xNd 2 O 3 where x= 0.0, 0.1, 0.5,1.0,1.5, and 2.0 in mole% glasses and was reported in this article that prepared glass showed superior stability against devitrification, high thermal, stability, and rigidity. Comparable to these reported glasses with specific Li 2 O mole fractions in our present glasses showed enhanced conductivity and it attributes for presence of higher structural stability and rigidity in glass (25) .…”

Physical, optical, thermoanalytical, and radiation response study of Eu2O3-doped zinc fluoro-telluroborate glasses

“…The decrease in 'E g ' is validated with an increase in NBOs in the glass network causing structural changes [2,46,47]. The red shift in band edges and the decrease in energy required for an ion/electron to transit from the valence to the conduction band proclaimed alteration in the interlinkage of oxygen bonding with the cations in the network [48,49]. These out-turn in the production of NBOs.…”

Deciphering the Nd3+ environment and energy-transfer mechanisms in thermally stable novel calcium aluminate glasses: elucidation of broadband high-gain performance for laser applications

“…More non-centrosymmetric local sites cause an improvement in the covalency of the RE-O bond and increase the Ω 2 value. Unlike Ω 2 , the Ω 4 and Ω 6 values do not depend directly on the RE-O bonds, but on the bulk property of the host system and the rigidity of the medium surrounding the RE ions [44,45]. The ratio of Ω 4 to Ω 6 is known as a spectroscopic quality factor (χ), which is used for estimating the relative emission probabilities via the 4 F 3/2 → 4 I 9/2 and 4 F 3/2 → 4 I 11/2 channels.…”

“…Nd 3+ ion-doped aluminate glasses also exhibit broadband emission in the ∼1.06 µm region compared to the other hosts, especially commercial phosphate and borate glasses, for which they are very promising candidates to fulfil Fourier's criterion (the product of the frequency bandwidth and minimum pulse length should be >0. 44) for ultrashort pulse laser applications [21]. A drawback with the widely used commercial phosphate glass systems in such applications is their narrow emission bandwidth [5].…”